You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brian Taylor.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, will you provide the preferable travelling dates please?

USER: Sure, I am planning to travel from 12/14 to 12/16.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, there is no flights found under your requested details.

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

ASSISTANT: Thanks for reaching us, have a great day.