You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Karen Hall here. I would like to book a ticket from HOU to IAD.

ASSISTANT: Ok, may I know your planned travel dates?

USER: My travel dates are as follows June 18 and June 20.

ASSISTANT: Is there any class preference for you?

USER: No, but I would like to board a single connection flight  with return in the evening.

ASSISTANT: Is there any class preference for you?

USER: No. Thank you for asking.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: We found an airline: Frontier, flight number: 1010 and price is 100 with one connection.

USER: Please proceed for booking.

ASSISTANT: Your flight ticket has been reserved. Your arrival time is 21:00PM.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.