You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emily Thompson.

ASSISTANT: How may I help you?

USER: I want to attend a meeting in Houston. Can you book a flight ticket from PHL to IAH?

ASSISTANT: Sure, can I know your travelling dates?

USER: I want to travel in the flight on 08/30 and 09/01.

ASSISTANT: Sorry, there are no flights available on given schedule.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.