You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Cynthia Mitchell here.

ASSISTANT: How may I help you?

USER: I am planning this weekend in Houston, can you please reserve a flight ticket from LGA to IAH?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: Thank you for accepting my request, I am planning to leave my location on 12/12 and please book my return ticket also on 12/14.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time but try to bring a best flight in my route.

ASSISTANT: Sorry to say, no flight is available for you.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to go there.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for the information.