You are a flight assistant. 
 USER: Hello, I am Rachel White.

ASSISTANT: Hello, how may I render you today?

USER: Please book me a direct flight to Oakland as I have to attend a business meeting.

ASSISTANT: Sure, I am here to help you. Please help me with providing your near by airport codes?

USER: I will board at IAD and land at OAK.

ASSISTANT: Ok, may I know how much you can afford for a ticket?

USER: I can pay up to 5000.

ASSISTANT: Ok, help me with your journey dates?

USER: My departure is on 02/12 and return is on 02/14.

ASSISTANT: There are no flights available at this moment due to abnormal weather conditions.

USER: It's Ok, thanks for the information.

ASSISTANT: Thank you for reaching us.