You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Catherine Robinson from Phoenix. I want to go to Seattle next week. Can you please help me in booking flight ticket?

ASSISTANT: Sure, please put forward your travelling dates?

USER: Thank you for accepting my request, I want to take off on 02/20 and confirm my return ticket also on 02/22.

ASSISTANT: Ok, provide me your near by airport codes?

USER: I would like to fly from PHX and destination airport is SEA.

ASSISTANT: There are no flights available on your travelling route at this moment.

USER: Oh! It's ok no problem, I will go with another airline service. Thank you for your information.

ASSISTANT: Thank you for choosing us.