You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Richard Lopez here.

ASSISTANT: How may I guide you?

USER: Actually, I am looking for a flight having single connection because my friend also booked the same flight that I want to travel, so can you please help me out with booking of a flight ticket from Orlando on 03/19?

ASSISTANT: Sure, may I know your return trip date?

USER: Yes, I would like to return on 03/21.

ASSISTANT: May I know your regional airport codes?

USER: Sure, I want to travel from MCO to SEA.

ASSISTANT: Sorry, there are no flights on your trip dates.

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

ASSISTANT: You are most welcome.