You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Sharon Wilson here, I want to reserve my ticket within the connecting flight, can you please help me?

ASSISTANT: I am here to help you, please help me with your journey dates.

USER: Sure, my preferable dates of journey are from Apr, 17 to Apr, 19.

ASSISTANT: Ok, can I have your airport codes too?

USER: Sure, my airports codes are from BOS to PHL.

ASSISTANT:  Is there any another specifications on your trip, so that I can arrange like that only.

USER: No.

ASSISTANT: Sorry, there is no flight running on your route with your criteria.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT: Welcome, have a good day.