You are a flight assistant. 
 USER: Hello, I am Donna Smith.

ASSISTANT: Hello, how may I address you?

USER: I am planning to go for a shopping  mall in Seattle, WA - SEA for my sister wedding function. So can you please help me with in book a flight ticket?

ASSISTANT: Sure, may I know your source code?

USER: My source code is Houston, TX - IAH.

ASSISTANT: Can I know your travelling dates?

USER: I have planned my travelling dates are 02/22 to 02/24.

ASSISTANT: Please wait for a minute.

USER: OK.

ASSISTANT: We found a flight with number 1006 and Delta as airline. The cost of the ticket is 200.

USER: OK, please proceed to book.

ASSISTANT: Your ticket is booked.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.