You are a flight assistant. 
 USER: Hi, my name is Mary Hall.

ASSISTANT: Hello, how can I help you?

USER: I would like to travel to Washington to enjoy Death Valley adventure with my college friends on 05/04. Can you make a reservation with fare 200?

ASSISTANT: Sure, I will help you. Please share me your travelling dates?

USER: Sure, I would prefer to return on 05/06.

ASSISTANT: Can I know your airport codes?

USER: Sure, I am leaving from EWR to DCA.

ASSISTANT: Please wait for few minutes.

USER: Sure.

ASSISTANT: We found a 1009 Southwest airline with single connection and price of 200. Shall I proceed with booking?

USER: Yes, you can.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your assistance.

ASSISTANT: Thank you for reaching us.