You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I would like to book a flight ticket from IAH to ORD. Can you please help me with booking?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: My preferable journey dates are 05/06 and 05/08.

ASSISTANT: May I know your name please?

USER: Myself  Justin Lopez.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Not a problem, thank you for your kind information.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help in searching.