You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Brandon White here, I want to reserve my ticket from OAK to IAD, can you please help me?

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

USER: Thank you.

ASSISTANT: May I know your journey dates to search a flight?

USER: Sure, my planned dates of journey is from 07/10 to 07/12.

ASSISTANT: Wait for a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry, I could not find any flight with your travel dates.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: My pleasure.