You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: My name is Charles Martin. I have a business meeting in Seattle. Can you help me for booking a flight ticket from LAS to SEA?

ASSISTANT: Sure, I am happy to help you with that. Can you please share your preferable journey dates?

USER: My travelling dates are 10/21 and 10/23.

ASSISTANT: Please wait for a minute.

USER: Sure, I will wait for your response.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.