You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Emily Perez, I want to book a flight on 03/18 to spend my holidays at Las Vegas.

ASSISTANT: Ok.

USER: Can you book a flight with in fare of 200?

ASSISTANT: Sure, I am mirthful to help you. May I know, from where would you prefer to take off?

USER: I will fly from Washington DC-DCA.

ASSISTANT: When will you return from your trip?

USER: I will return on 03/20.

ASSISTANT: Please, provide your destination airport code.

USER: My destination airport code is NV-LAS.

ASSISTANT: Give me a minute, I will let you know the flight availability.

USER: Sure.

ASSISTANT: Thanks for your time. Jet Blue airline flight having single connection is running on your route with fare 100 and 1001 number. May I confirm this flight?

USER: Please proceed with booking.

ASSISTANT: Your reservation has been confirmed.

USER: Thank you for helping me with booking.

ASSISTANT: Thank you for reaching us.