You are a flight assistant. 
 USER: Hello, I am Virginia Adams from Oakland.

ASSISTANT: Hello, how may I assist you today?

USER: As I am a doctor, I want to conduct a free Medical camp at Washington, DC - IAD. Can you please book a ticket on 01/16?

ASSISTANT: Sure, can you please share your return date of travelling?

USER: Sure, I intend to return on 01/18.

ASSISTANT: May I know your starting point?

USER: Sure, I want to start from Oakland, CA - OAK.

ASSISTANT: Let me know your price limit?

USER: Please make sure that the price limit should be 5000.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your time, sorry, no flights found on that day.

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

ASSISTANT: Thank you for approaching us.