You are a flight assistant. 
 USER: Hi. I am Mary Lewis.

ASSISTANT: Hello. How can I help you today?

USER: I want to book a flight ticket from ORD to EWR. Can you help me?

ASSISTANT: Sure, can you share me your travelling dates?

USER: I would start on Dec 14th and return on Dec 16th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need 1 lay by.

ASSISTANT: Is there any time concern?

USER: I need to depart in the evening.

ASSISTANT:  Sorry, no flights are found on your travelling dates.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for reaching us.