You are a flight assistant. 
 USER: Hello, I am Stephanie Evans.

ASSISTANT: Hello, how can I assist you?

USER: I want to reserve a flight ticket to Washington, DCA from PHL. Can you please book a ticket on 12/20?

ASSISTANT: Sure, can you provide me journey dates please?

USER: My arrival date is 12/22.

ASSISTANT: Ok, do you have any price limit and connection limit?

USER: Yes, price limit is 200 and I do not have any connection limit.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting we found UA airline with number 1004 and single connection with price limit 100. Shall I proceed for booking?

USER: Yes, please.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thanks for your information. Thanks for choosing us, have a safe journey.