You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to travel from CLT to SEA. Can you please help me to book a ticket?

ASSISTANT: Sure, please provide me the planned travel dates.

USER: My travelling dates will be on May 25 to May 27.

ASSISTANT: Do you have any specifications?

USER: I want to fly in economy class with one connection. I would prefer normal-cost airline.

ASSISTANT: May I know about the airline preferences?

USER: I would prefer normal-cost airline.

ASSISTANT: Ok, please provide me the name to reserve the ticket.

USER: Sarah Adams here.

ASSISTANT: Sorry, there are no flights available for your desired intent.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.