You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Rebecca Baker.

ASSISTANT: How can I address you today?

USER: I want to book a direct flight ticket to attend an emergency case . Can you help me?

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

USER: 04/11 and 04/13 are my travelling dates.

ASSISTANT: Let me know your source and landing airport codes?

USER: DC-IAD will be my source and destination airport codes.

ASSISTANT: Thank you for your details. There are no flights available with the given connection limit.

USER: No issue. Thank you.

ASSISTANT: Thank you for choosing us.