You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I reach out to you?

USER: I am Thomas Green, planning to go for Rockridge ice cream & gelato tour along with my fiance at Oakland, OAK. Can you please reserve a flight ticket for me?

ASSISTANT: Sure, may I know when would you like to travel?

USER: I am planning to travel on 08/01 to 08/03.

ASSISTANT: How much can you afford for the ticket?

USER: My price limit is 500.

ASSISTANT: Kindly share your source details.

USER: Washington, IAD is my boarding point of trip.

ASSISTANT: Thanks for giving your details. There are no flights available at this moment.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.