You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Charles White. Can you please book a flight ticket from IAH to LGA?

ASSISTANT: Ok, I will help you with that. May I know travel dates?

USER: Sure, I need to travel on dates of 02/02 and 02/04.

ASSISTANT: Sorry, there are no flights available.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for connecting with our agency.