You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to meet my business partner at Seattle, please help me in booking a ticket from IAD to SEA.

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: My planned travel dates are on May 14 and May 16.

ASSISTANT: May I know your name?

USER: My name is Michelle Green.

ASSISTANT: Do you have any other specifications?

USER: I prefer business class for my trip.

ASSISTANT: Ok, wait for some time.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting there are no flights found on your details.

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

ASSISTANT: Thanks for approaching us.