You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Patrick Hill.

ASSISTANT: Yes, Hill.

USER:   I am planning to visit Olympic National Park at Washington, could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your journey dates please?

USER: My travelling dates are 10/26 to 10/28.

ASSISTANT: Can you please help me with your airport codes?

USER: I will fly from SFO to DEN.

ASSISTANT: UA airlines is having a flight with travel charge of 400, shall I proceed booking?

USER: You can book it.

ASSISTANT: Your ticket has been booked with flight-1024, have a safe journey.

USER: Thank you for helping.

ASSISTANT: Thank you for choosing us.