You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gregory Evans here.

ASSISTANT: How can I assist you for today?

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

ASSISTANT: Yes, I can help you.

USER: Thank you.

ASSISTANT:  Can you share me your travelling dates?

USER: Sure, I am planning to leave my location on 03/27 and please book my return ticket on 03/29.

ASSISTANT: Ok, can I know your nearest airport codes?

USER: I will choose SFO and DLT as my origin and destination airport codes because they are very convenient airport codes to me.

ASSISTANT: Give me a moment.

USER: Sorry, CLT as my destination airport code.

ASSISTANT: Ok.

USER: Ok, take your time.

ASSISTANT: I have found a flight ticket with a price of 100 and 1 connection.

USER: Sorry, I need a direct flight. Please check for it.

ASSISTANT: Sorry, no flight found on your requested dates.

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

ASSISTANT: Thank you for contacting us.