You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Catherine  White. I am planning to travel from DFW to PHL, can you help in booking?

ASSISTANT: Sure, I will check for the flights. Please tell me your travelling dates?

USER: My date of travelling 10/2. My date of travelling is on 10/23 to 10/25.

ASSISTANT: Ok. Sorry to inform you White, there are no flights with the dates you provided.

USER: That's ok. Thank you for your help.

ASSISTANT: It's my pleasure. Thank you for reaching us.