You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to travel from SFO to PHX. Can you help me to book a flight ticket?

ASSISTANT: Sure, I will help you. Can you please share your travel dates?

USER: I want to travel in the flight on Feb 11 and Feb 13.

ASSISTANT: Ok, may I know your name?

USER: Charles Carter.

ASSISTANT: Do you have any specification?

USER: I want to return in morning time.

ASSISTANT: As per your request, no flights are available on your route.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.