You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Scott.

ASSISTANT: Scott, how can I assist you?

USER: Can you be a help to me in booking a flight from PHX to IAH?

ASSISTANT: Sure, can you please let me know your travel dates?

USER: Ok, please book the flight on the date 03/23 and return date is 03/25.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, please go ahead take your time.

ASSISTANT: Sorry Scott, there are no flights available on your given travel dates.

USER: Ok, not a problem. Anyways thank you for assisting me.

ASSISTANT: You are welcome and thank you for choosing us.