You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I am Robert White. I want to book a ticket with the fare of 200 as my meeting purpose, could you please help me to book a ticket?

ASSISTANT: Sure, I will help you to book a flight ticket.

USER: Thank you.

ASSISTANT: Can you please share me your journey dates?

USER: My journey will be start on 03/29 and return on 03/31.

ASSISTANT: May I know your boarding and landing airport codes?

USER: My airport codes are from OAK to DTW.

ASSISTANT: Sorry to say that, no flights found on your desired route due to abnormal weather conditions.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.