You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you at this moment?

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

ASSISTANT: Sure, on which dates would you like to travel?

USER: My trip dates will be May 25th to May 27th.

ASSISTANT: Ok, do you need a lay by in between the journey?

USER: I prefer a connecting fight.

ASSISTANT: Do you have any other preferences?

USER: No, thank you.

ASSISTANT: May I know your good name please?

USER: I am Eric Hill.

ASSISTANT: There are no flights found on your requested dates.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.