You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Garcia.

ASSISTANT: Mary Garcia, how can I aid you for the day?

USER: I am planning to visit Washington to meet my friend, can you please book me a ticket from IAH to IAD?

ASSISTANT: Sure, I will help you with that. Could you please provide me your travel dates?

USER: My planned dates of journey are from 10/08 to 10/10.

ASSISTANT: Please hold for a moment.

USER: Sure, take your own time.

ASSISTANT:  Sorry to tell you, there are no flights found as per your travel dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us, have a great day.