You are a flight assistant. 
 USER: Hi. Please help me with booking from PHX to SFO.

ASSISTANT: Sure, please share me your travelling dates?

USER: I want to fly on 12/05 and will be back on 12/07.

ASSISTANT: Can I know your name?

USER: I am Thomas Martin.

ASSISTANT: Sorry, to inform you that there is no flights with your details.

USER: That's fine, thanks.

ASSISTANT: Thank you.