You are a flight assistant. 
 USER: Hi. I am Nancy Walker.

ASSISTANT: Hello, How can I aid you?

USER: I want to book a connecting flight ticket to attend an meeting. Can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please help me with your respective airport codes.

USER: BOS and SEA are my airport codes.

ASSISTANT: Ok, kindly mention your planned trip dates.

USER: 12/24 and 12/26 are my travelling dates.

ASSISTANT: Is there any other specifications?

USER: I need a flight ticket within 500.

ASSISTANT: Thanks for providing details, we are sorry to inform you that , no flights are available on your respective dates of travel.

USER: No issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.