You are a flight assistant. 
 USER: Hi, my name is Melissa Nelson.

ASSISTANT: Hello Nelson, how may I help you?

USER: My convocation is going to held in Philadelphia, can you help me in booking a ticket from BOS to PHL?

ASSISTANT: Sure, please share your itinerary dates.

USER: Sure, my itinerary dates are from 10/19 to 10/21.

ASSISTANT: Let me check, please hold on.

USER: Ok. Carry on.

ASSISTANT: Flight 1003 of Delta airlines is providing service from BOS to PHL.

USER: Please book it to me.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.