You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: My name is Elizabeth Wilson.

ASSISTANT: How may I assist you?

USER: Can you please book a flight ticket with in the range of 200 from Seattle?

ASSISTANT: Sure, may I know on which dates you would like to travel?

USER: Sure, 09/12 - 09/14 are my travelling dates.

ASSISTANT: Help me with the airport codes?

USER: My source code is WA - SEA and destination code is Houston, TX - IAH.

ASSISTANT: Sorry, we do not found any flights running in your given details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.