You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am planning to attend music concert at ORD, can you please help me with booking a flight ticket from IAD?

ASSISTANT: Let me know your travelling dates.

USER: My journey dates are Aug 27 to Aug 29.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight which depart in morning.

ASSISTANT: Let me know your name.

USER: I am Donna Adams.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: No issue, thank you.

ASSISTANT: Thank you.