You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: As my doctor said me to go for a change, so I would like to visit Boston Harbour Island as my friend suggest me that it is a nice place. Could you please assist me to reserve a ticket to Boston, MA - BOS?

ASSISTANT: sure, when have you planned your journey?

USER: I am planning to travel on 05/23 and intend to back on 05/25.

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

USER: Yes, I prefer a flight with a halt.

ASSISTANT: Ok, can you please provide your source code?

USER: Sure, I am heading from Chicago, IL - ORD.

ASSISTANT: Let me know your good name for further booking process.

USER: Sure, my name is Sandra Mitchell. Please search for a cheaper flight because I can afford up to 200.

ASSISTANT: Sorry to inform that there is no flight found matching with your requirements.

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

ASSISTANT: Thank you for choosing our service.