You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am looking for a flight from PHX To DEN, can you help me out?

ASSISTANT: Can you please tell me your travel dates?

USER: My travel dates are from 08/11 till 08/13.

ASSISTANT: May I know your name?

USER: Ok, myself Gary Evans.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your required dates.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.