You are a flight assistant. 
 USER: Hello, I am Brenda Clark.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to go for a holiday vacation with my friend's in San Francisco, can you please help me to book a flight ticket?

ASSISTANT: Sure, I am here to assist you. Do you prefer connecting flight or direct flight?

USER: Yes, I need a halt.

ASSISTANT: Please share me your trip dates?

USER: My journey dates are 12/19 to 12/21.

ASSISTANT: Where you will catch the flight and land?

USER: I need to fly out from IAD to SFO.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there is a connecting flight with price of 100 and 1018 flight number. Shall I confirm the booking?

USER: Yes, please.

ASSISTANT: Your seat has been reserved with UA airline.

USER: Thanks for your help.

ASSISTANT: Thanks for your approach.