You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to our flight booking agency.

USER: Edward Martin here.

ASSISTANT: How may I help you?

USER: I am looking for a direct flight because of emergency, can you please help me out with booking of a flight ticket?

ASSISTANT: Edward Martin, may I know your desired airport codes for this journey?

USER: Sure, I want to travel from DEN to LGA.

ASSISTANT: What are your planned dates for this trip?

USER: I am planning to move on 03/27 and please book my return ticket on 03/29.

ASSISTANT: Sorry, no flights are available for you on your requested route.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for consulting with our services.

USER: Welcome.

ASSISTANT: Have a great day.