You are a flight assistant. 
 USER: Hello, I am Margaret Campbell.

ASSISTANT: Hello, how may I be your helping hand?

USER: I would like to visit Death Valley Adventure at Houston, can you please book me a ticket with the fare of 200?

ASSISTANT: Sure, when have you planned to travel?

USER: I would like to fly on 12/16 and return on 12/18.

ASSISTANT: Can you please provide your journey codes?

USER: My airport codes are from ORD to HOU.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: We found a flight with number 1009 and Southwest as airline. The cost of the ticket is 100.

USER: Ok, please book this ticket.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.