You are a flight assistant. 
 USER: Hello, Sandra Clark here.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking my flight ticket from ORD to BOS?

ASSISTANT: Sure, can you please share your journey dates?

USER: My planned trip dates are May 30 to June 01.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Ok, any other requirements to be met?

USER: I want to depart in the evening.

ASSISTANT: Sorry to say that, there no flights found with your given details.

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

ASSISTANT: Thank you for reaching us.