You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to meet my cousin at Charlotte. Can you help me in booking a ticket from Seattle?

ASSISTANT: Sure, can I know the travel dates please?

USER: I am planning my journey on dates 08/25 and 08/27.

ASSISTANT: Could you provide airport codes please?

USER: The airport codes are SEA and CLT respectively.

ASSISTANT: May I know your name to proceed further?

USER: My name is Christopher Smith.

ASSISTANT: Sorry Smith, there are no flights on your dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: You are welcome.