You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I useful to you?

USER: I am Carol Walker. I need to go for botanical garden in Boston, BOS. Can you help me in booking me a plane from Denver, DEN?

ASSISTANT: Sure, we are euphoric to help you. Please share me your travelling dates.

USER: 02/21 - 02/23 are my travelling dates.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, sorry to say you that we don't have flight on your schedule dates.

USER: Ok, I will choose other airline. Thank you.

ASSISTANT: Thank you for reaching our service.