| carry the passenger | 0.82 |
| carry good | 0.52 |
| included in annex a. | 0.48 |
| issue ticket | 0.47 |
| make an advance payment | 0.46 |
| operate an air service | 0.37 |
| inform the passenger | 0.36 |
| operate in internationa… | 0.29 |
| perform the flight | 0.27 |
| offer free or discounte… | 0.25 |