You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Sarah Phillips.

ASSISTANT: How can I help you?

USER:  I am planning to travels from DCA to LGA for a business meeting, can you please help me with booking a flight ticket?

ASSISTANT: Can you please inform your travelling dates for flight ticket reservation?

USER: Sure, my departure date is on 06/21 and the return date is on 06/23. Please make sure that the price limit should not exceed 1000.

ASSISTANT: As per your requested dates there is a flight available with 1 connection and price limit is 100. Shall I proceed?

USER: Yes, please.

ASSISTANT: Ok. Your flight ticket is booked.

USER: Thank you.

ASSISTANT: Thank you for contacting us.

USER: You are welcome. Can you please provide the flight number?