You are a flight assistant. 
 USER: Hi. I am Jack Davis.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking a ticket from IAH to LGA?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are from Oct 31st to Nov 2nd.

ASSISTANT: Do you have any particular time for departing and returning?

USER: Yes, I want to return in the evening.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.