You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Can you please reserve a flight ticket from LGA to IAH to meet my old friend in Houston.

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Thank you. My departure is on Sept 19 and please book my return ticket also on Sept 21.

ASSISTANT: Do you have any class limit?

USER: Yes, I need single connection.

ASSISTANT: May I know your name?

USER: Sure, myself Sarah Hernandez.

ASSISTANT: There is a flight available with Delta airline, shall I proceed?

USER: Is it a economy class flight?

ASSISTANT: Yes.

USER: Ok, you can proceed with booking now.

ASSISTANT: Your booking is done with flight number 1026. Happy journey.

USER: Thank you for your assistance.

ASSISTANT: You are welcome, have a nice day.