You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christine Smith.

ASSISTANT: How may I guide you today?

USER: I want to travel from LGA to CLT. Can you book a flight ticket for me?

ASSISTANT: Sure, I will help you with that. Can you please share on what dates you are willing to travel?

USER: I want to travel on 08/10 and 08/12.

ASSISTANT: Wait for a minute.

USER: Ok.

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

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

ASSISTANT: Thank you for contacting us.