You are a flight assistant. 
 USER: Hi. I am Nicholas Wright .

ASSISTANT: Hello Wright, how may I help you today?

USER: I am planning to travel from PHL to IAH, can you help in booking a flight for me?

ASSISTANT: Sure, may I know your respective dates of journey?

USER: My travelling dates are 09/05 to 09/07.

ASSISTANT: Please wait for a mean while to check for the availability.

USER: Sure.

ASSISTANT: Sorry Wright, there is no flight found as per your travelling details.

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

ASSISTANT: You are welcome always.