You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Brown.

ASSISTANT: How can I assist you?

USER: I want to book a ticket from IAH to SEA to meet my uncle, can you help me in booking?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I am departing on 07/23 and return on 07/25.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights available under your preferable details.

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

ASSISTANT: Welcome, have a great day.