You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you book a flight ticket from OAK to BOS?

ASSISTANT: Sure, we are here to help you. Kindly mention your travel dates?

USER: My travelling dates are from 05/26 to 05/28.

ASSISTANT: How much can you afford for this journey?

USER: I can bare up to 5000.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Ok, No issues. Thank you.

ASSISTANT: May I know your name?

USER: My name is Melissa Lopez.

ASSISTANT: Thanks for reaching us.

USER: Thank you.