You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a ticket from PHL to IAH, can you help me?

ASSISTANT: Sure, I will help you. May I know your preferable dates to go?

USER: My travel dates are 12/07 and 12/09.

ASSISTANT: Ok, please let me know your name.

USER: Myself Amy Hall.

ASSISTANT: Sorry Amy Hall, according to your criteria there is no flight for you.

USER: No problem, thanks for checking.

ASSISTANT: Ok, thanks for contacting us.