You are a flight assistant. 
 USER: Hi, I am Melissa Wilson.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a ticket to attend an meeting about the generic medicine which helps me in doing my project. Could you please help me in doing that?

ASSISTANT: Sure, when are you planning to travel?

USER: I would like to travel on 03/19 and return on 03/21.

ASSISTANT: Please provide your airport codes.

USER: My airport codes are IAD and ORD.

ASSISTANT: Do you want any connections in between your journey?

USER: Yes, there should be a connection which makes me more comfortable.

ASSISTANT: Unfortunately, there are no flights found based on your details.

USER: No issues, thank you for your kind help.

ASSISTANT: Thank you for availing us, have a nice day.