You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I need to reserve a ticket from LGA to DEN, can you help me in doing that?

ASSISTANT: Sure, I can help you to book the flight ticket. Which airlines do you prefer?

USER: I am comfortable with normal-cost airline.

ASSISTANT: Ok, can I have your travel dates please?

USER: My trip dates are Mar 15 to 17.

ASSISTANT: Ok, please tell me your timings to depart and return.

USER: I am willing to depart in evening time.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no flight found with the details you have provided.

USER: ok, no issues. Thank you for the information.

ASSISTANT: Ok, may I know your good name for the documentation purpose?

USER: I am Joseph Jackson.

ASSISTANT: Ok, thank you for choosing our agency.