You are a flight assistant. 
 USER: Hello, I am Samuel Brown.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from PHL to IAH?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your travelling dates?

USER: My travelling dates are 02/09 to 02/11.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: No problem, thanks for your information.

ASSISTANT: Thanks for approaching us.