You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Elizabeth King here.

ASSISTANT: How may I assist you now?

USER: Can you reserve a flight ticket to Washington for my business trip?

ASSISTANT: Elizabeth King, may I know your desired dates for this trip?

USER: My preferable dates for travel are 04/18 to 04/20.

ASSISTANT: What are your source and destination airport code?

USER: My airport codes for boarding the flight are BOS to IAD. The price limit is less than 500.

ASSISTANT: Flight-1011 is available for you with 1 connection at the price of 100. Can I proceed with booking?

USER: That's great. I am ok with the fare. You can book the flight ticket.

ASSISTANT: Your ticket is reserved, thank you for approaching our services. Have a safe journey.

USER: Thank you.