You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you help me in booking my flight ticket from LGA to IAH?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates will be July 22nd to July 24th.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight as I need to attend the emergency case.

ASSISTANT: Sure, may I know about the class or airline preferences?

USER: No, I am fine with any flight.

ASSISTANT: Please provide me the name to reserve the flight ticket.

USER: Please reserve my flight ticket with the name Justin Wilson.

ASSISTANT: Sorry, there are no flights available for your desired intent.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.

USER: Thank you.