You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Gary King.

ASSISTANT: How may I guide you?

USER: I would like to visit Dallas World Aquarium at Dallas. Can you help me in booking a ticket to Dallas?

ASSISTANT: May I know your airport codes please?

USER: The airport codes are LAS and DFW respectively.

ASSISTANT: Please help me with your journey dates.

USER: My journey dates are 10/12 and 10/14.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry, no flights has been found on your requested dates.

USER: Ok, I will find other way out. Thank you for providing me the information.

ASSISTANT: Thank you for using our service.