You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amy Walker.

ASSISTANT: How can I assist you?

USER: Can you please help me in booking my flight ticket from IAH to PHX?

ASSISTANT: Sure, I am here to help you. Could you please help me with your travelling dates?

USER: Ok, my travelling dates are Oct 31 and Nov 02.

ASSISTANT: Ok, please wait for a while.

USER: Ok, sure.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: Ok, fine thank you for checking.

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