You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Nicole Mitchell.

ASSISTANT: How may I aid you?

USER: I have planned to visit my parents in Houston. Could you please help me with booking a flight ticket from PHX to HOU?

ASSISTANT: Sure. May I know your travel dates please?

USER: My planned travel trip dates are from 10/09 to 10/11.

ASSISTANT: Thanks for waiting patiently. But I am sorry to say that presently there are no flights available.

USER: Ok, no problem I will search for another flight with my required dates.

ASSISTANT: Ok, thank you.

USER: Thank you for searching.