You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: My name is Benjamin Campbell. I would like to book a ticket to Houston on the occasion of my brother's birthday.

ASSISTANT: Ok. May I know your dates of travel?

USER: My itinerary dates are Jul 25 and Jul 27.

ASSISTANT: Can you please provide your airport codes?

USER: My genesis and terminus airport codes are SEA and HOU.

ASSISTANT: Do you need any halt in between your journey?

USER: Not preferably. Thank you.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: We found a direct flight of AA airlines which costs 200, shall I proceed with booking?

USER: Please proceed with reservation.

ASSISTANT: Your booking has been processed.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.